I think it is actually possible to have such casinos were one will pay using bitcoin in physical casino, but think about those waiting time due to slow network confirmation
Personally, I don't think it would be an issue
In regular, bricks-and-mortar casinos you don't play with your cash anyway. The point is, if such a casino were to enable cryptocurrency gambling, they would most certainly require you to deposit a few bitcoins before you are even allowed to enter the casino's premises ("proof of wealth"). Well, it is essentially the same process as with online casinos where you are required to top up your balance before you can start playing. So, this is not an issue really
What is an issue, though, is the fact that there is no demand from the gambling public for Bitcoin land-based casinos as this public can easily gamble at home without moving their ass, or exchange their bitcoins to fiat if they wanted to visit a regular casino, Las Vegas style and flair, hookers and all